{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "2 . The objective of this article is to examine the effects of single and repeated administrations of silymarin on pharmacokinetics of a P - gp substrate , risperidone , and its major metabolite , 9 - hydroxyrisperidone , in rats ."}
{"Chemical": ["risperidone", "9 - hydroxyrisperidone"]}